Card Number Validation in all languages in chars. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E ALGOL 68 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E ALGOL 68 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 641st TaserTheFox 🇺🇸 539 120 17ms 8 Oct 2024 641st yokasuretsu 539 120 11ms 26 Jan 2025 641st Troon 539 120 11ms 17 Feb 2025 644th Sciman101 539 147 2ms 26 Mar 2025 645th mousetail 🇳🇱 538 128 2ms 3 Oct 2024 646th BREMAUCY 🇫🇷 534 121 24ms 18 Jul 2025 647th msbranicky 533 175 164ms 13 Dec 2024 648th deancureton 532 121 12ms 30 Dec 2024 649th chartung17 530 122 10ms 24 Mar 2025 650th msbranicky 530 126 2,523ms 9 Jan 2025 651st msbranicky 525 123 18ms 3 Oct 2024 651st bobbysq 525 123 11ms 5 Oct 2024 651st wuzekai518 525 123 10ms 8 Oct 2024 654th dokutan 525 131 2ms 14 hours ago 655th Macweese 525 178 406ms 3 Aug 2025 656th galloj 🇨🇿 522 112 19ms 4 Oct 2024 657th NotEvenIndian 521 124 10ms 22 Oct 2024 657th ridingqwerty 🇺🇸 521 124 16ms 16 Jan 2025 657th CommandLeo 🇮🇹 521 124 11ms 5 Oct 2025 660th snoozingnewt 🇨🇦 520 213 138ms 2 Nov 2025 661st bac0id 519 180 388ms 9 Jan 2025 662nd bnic24 517 125 16ms 3 Oct 2024 662nd adoxography 517 125 11ms 22 Oct 2024 662nd lelbal 517 125 10ms 14 Oct 2025 665th sidok 515 109 248ms 13 Nov 2024 666th dokutan 514 143 154ms 19 Oct 2024 667th nephila-nacrea 🇬🇧 511 77 3ms 2 Oct 2024 668th emgordon154 511 156 8ms 13 Dec 2024 669th isaiah0311 🇺🇸 510 135 2ms 2 days ago 670th KatieLG 🇬🇧 510 140 440ms 1 Oct 2024 671st yoshykai 510 183 403ms 12 Apr 2025 672nd CatsAreFluffy 509 127 18ms 30 Oct 2024 672nd WillowWispy 509 127 11ms 25 May 2025 674th Chinay-Domitrix 🇺🇸 509 131 2,347ms 30 Mar 2025 675th KatieLG 🇬🇧 509 146 8ms 2 Oct 2024 676th snoozingnewt 🇨🇦 503 142 463ms 2 Nov 2025 677th madex 🇩🇪 501 129 17ms 2 Oct 2024 677th RedzGoose 🇦🇺 501 129 11ms 15 Oct 2024 677th calebaitken 501 129 11ms 11 Apr 2025 677th rollershutter 501 129 17ms 20 Nov 2025 681st msbranicky 501 138 3ms 3 Oct 2024 682nd blaztoma 🇱🇹 500 154 109ms 28 Nov 2025 683rd MeWhenI 🇻🇦 499 149 56ms 4 Oct 2024 684th janAkali 🇷🇺 499 167 357ms 8 Oct 2024 685th Europe2048 497 130 10ms 2 Oct 2024 685th nstearns96 🇬🇧 497 130 17ms 2 Oct 2024 685th Stockoh 🇫🇷 497 130 17ms 4 Jul 2025 688th inverseLorentz 🇦🇺 493 131 11ms 7 Oct 2024 688th sciencejiho 493 131 17ms 11 Feb 2025 688th Jaydosu 493 131 15ms 11 Apr 2025 688th Emutis 🇱🇹 493 131 9ms 11 Nov 2025 692nd CarterStroik 493 161 2ms 19 Nov 2025 693rd HumanoidCPU 492 145 479ms 5 Oct 2024 694th TheRealOhead 🇺🇸 491 131 14ms 1 Oct 2024 695th h-hh-hhh 🇺🇦 491 177 59ms 2 Nov 2024 696th snoozingnewt 🇨🇦 490 150 154ms 2 Nov 2025 697th jlangvand 488 141 2ms 15 Oct 2024 697th HumanoidCPU 488 141 1ms 7 Mar 2025 699th snoozingnewt 🇨🇦 487 249 26ms 2 Nov 2025 700th snoozingnewt 🇨🇦 486 117 1,338ms 2 Nov 2025 701st Mabeloid 🇳🇴 486 133 11ms 2 Oct 2024 702nd mitzal 483 180 61ms 9 Feb 2025 703rd snoozingnewt 🇨🇦 482 173 332ms 2 Nov 2025 704th KatieLG 🇬🇧 479 120 490ms 1 Oct 2024 705th MiffOttah 476 150 457ms 6 Oct 2024 705th mwarvik 🇳🇴 476 150 450ms 1 Jan 2026 707th sciencedjinn 475 136 11ms 8 Nov 2024 707th ihatethefrench 475 136 18ms 4 Jan 2025 707th Florian-Mt 475 136 17ms 5 Dec 2025 710th alphafalfa 472 92 2ms 8 Nov 2024 711th kurkale6ka 472 137 22ms 16 Oct 2024 711th 4ndyJ 🇬🇧 472 137 12ms 14 Nov 2024 711th Mikey-Beep 🇬🇧 472 137 17ms 6 Aug 2025 711th wobblybits 472 137 19ms 17 Aug 2025 711th Andrey2001 472 137 10ms 9 days ago 716th luca1339 472 198 425ms 4 Nov 2024 717th ejini6969 469 102 37ms 14 Jun 2025 718th h-hh-hhh 🇺🇦 468 147 2ms 2 Nov 2024 719th snoozingnewt 🇨🇦 466 200 216ms 2 Nov 2025 720th scpchicken 🇵🇼 465 139 17ms 6 Oct 2024 First Prev 641–720 of 884 Next Last